Apple has added APIs to iOS 5 that developers can use to locate faces within a photo, observes 9to5Mac. The new capabilities are thought to be a result of Apple's acquisition of Polar Rose last year.
A CIFaceFeature object describes a face detected in a picture. Its properties provide locations for the face's eyes and mouth.
A CIDetector object uses image processing to look for specific features in a picture.
These APIs will make it easier for developers to implement facial recognition for their applications and could hint at a deeper integration of face detection in iOS.
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